Polyprotic acid
[化] 多元酸
🧩 词语组成解析
🗣️ 情景例句
One day, you'll have your own family,
总有一天，你会有你自己的家，
No one (or man) is born wise or learned.
人非生而知之者。
Is this the right bus for the Capital Library?
这辆车到首都图书馆吗？